Templates not displaying in Assets

We have a corporate account with sub accounts. When I'm in a campaign email in the corporate account and save it as a Template, it shows up among the available templates when editing the email but it doesn't show up in the list of Templates from the Assets view, so I have no way of sharing across all accounts. How do I access those templates to share with sub accounts?

Templates created using the Save as Template function are only available within the sub-account they were created in.

If you'd like to use these templates within the Assets section, they'll need to be recreated from scratch within Template Builder (under Assets). Once the template is rebuilt within Template Builder, it can be used as a starting point for future templates and campaigns built within Assets (using Template Builder and Campaign Builder).